Elaboration,Structure, and Intense Upconversion in Transparent KYb2F7:Ho3+ Glass‐Ceramics |
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| Authors: | YunLe Wei HeMing Yang XiaoMan Li LongJun Wang Hai Guo |
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| Affiliation: | 1. Department of Physics, Zhejiang Normal University, , Jinhua, Zhejiang, 321004 China;2. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, , Guangzhou, Guangdong, 510640 China |
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| Abstract: | Novel transparent oxyfluoride glass‐ceramics containing KYb2F7:Ho3+ nanocrystals were successfully elaborated by melt‐quenching technique with further thermal treatment for the first time. Their structural and luminescent properties were investigated systemically by XRD, HRTEM, absorption spectra, upconversion spectra, and lifetime measurements. Under 980 nm laser excitation, all samples exhibited characteristic emissions of Ho3+. Attractively, the upconversion emissions of Ho3+, especially green and near‐infrared emissions, were enormously enhanced 190 times after crystallization. The incorporation of Ho3+ into KYb2F7 nanocrystals with lower phonon energy was responsible for this phenomenon. Our research may enrich the understanding of fluoride‐nanocrystals‐based transparent oxyfluoride glass‐ceramics. |
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